X-Hacker.org- Ralf Brown's Interrupt List (Part 1,2) - int 2f - multiplex - xms

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INT 2F - Multiplex - XMS - INSTALLATION CHECK
        AX = 4300h
Return: AL = 80h XMS driver installed
        AL <> 80h no driver
Notes:  XMS gives access to extended memory and noncontiguous/nonEMS memory
          above 640K
        this installation check DOES NOT follow the format used by other
          software
SeeAlso: AX=4310h

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